Java tutorial
/* * Copyright (c) 2015 Washington State Department of Transportation * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/> * */ package gov.wa.wsdot.mobile.client.activities.amtrakcascades.schedules.details; import com.google.gwt.aria.client.Roles; import com.google.gwt.core.client.GWT; import com.google.gwt.i18n.client.DateTimeFormat; import com.google.gwt.i18n.client.TimeZone; import com.google.gwt.i18n.client.TimeZoneInfo; import com.google.gwt.i18n.client.constants.TimeZoneConstants; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlUtils; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.uibinder.client.UiHandler; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Widget; import com.googlecode.mgwt.dom.client.event.tap.TapEvent; import com.googlecode.mgwt.ui.client.MGWT; import com.googlecode.mgwt.ui.client.widget.base.HasRefresh; import com.googlecode.mgwt.ui.client.widget.header.HeaderTitle; import com.googlecode.mgwt.ui.client.widget.list.celllist.CellList; import com.googlecode.mgwt.ui.client.widget.list.celllist.CellSelectedEvent; import com.googlecode.mgwt.ui.client.widget.panel.flex.FlexSpacer; import com.googlecode.mgwt.ui.client.widget.panel.pull.PullArrowHeader; import com.googlecode.mgwt.ui.client.widget.panel.pull.PullArrowWidget; import com.googlecode.mgwt.ui.client.widget.panel.pull.PullPanel; import com.googlecode.mgwt.ui.client.widget.panel.pull.PullPanel.Pullhandler; import com.googlecode.mgwt.ui.client.widget.progress.ProgressIndicator; import gov.wa.wsdot.mobile.client.util.ParserUtils; import gov.wa.wsdot.mobile.client.widget.button.image.BackImageButton; import gov.wa.wsdot.mobile.shared.AmtrakCascadesServiceItem; import java.util.Date; import java.util.List; public class AmtrakCascadesSchedulesDetailsViewGwtImpl extends Composite implements AmtrakCascadesSchedulesDetailsView { /** * The UiBinder interface. */ interface AmtrakCascadesSchedulesDetailsViewGwtImplUiBinder extends UiBinder<Widget, AmtrakCascadesSchedulesDetailsViewGwtImpl> { } /** * The UiBinder used to generate the view. */ private static AmtrakCascadesSchedulesDetailsViewGwtImplUiBinder uiBinder = GWT .create(AmtrakCascadesSchedulesDetailsViewGwtImplUiBinder.class); @UiField HeaderTitle heading; @UiField(provided = true) CellList<AmtrakCascadesServiceItem> cellList; @UiField BackImageButton backButton; @UiField FlexSpacer leftFlexSpacer; @UiField(provided = true) PullPanel pullToRefresh; @UiField HTML title; @UiField ProgressIndicator progressIndicator; private Presenter presenter; private PullArrowHeader pullArrowHeader; private DateTimeFormat dateFormat = DateTimeFormat.getFormat("hh:mm a"); private DateTimeFormat updateDateFormat = DateTimeFormat.getFormat("MMMM d, yyyy h:mm a"); private final TimeZoneConstants timeZoneConstants = GWT.create(TimeZoneConstants.class); private final TimeZone usPacific = TimeZone .createTimeZone(TimeZoneInfo.buildTimeZoneData(timeZoneConstants.americaLosAngeles())); private String fromLocation; private String toLocation; public AmtrakCascadesSchedulesDetailsViewGwtImpl() { pullToRefresh = new PullPanel(); pullArrowHeader = new PullArrowHeader(); pullToRefresh.setHeader(pullArrowHeader); cellList = new CellList<AmtrakCascadesServiceItem>( new AmtrakCascadesSchedulesDetailsCell<AmtrakCascadesServiceItem>() { @Override public SafeHtml getScheduledDeparture(AmtrakCascadesServiceItem model) { String schedDepartureTime = model.getLocation().get(0).get(fromLocation) .getScheduledDepartureTime(); if (schedDepartureTime != null) { Date scheduledDepartureTime = new Date(Long.parseLong( model.getLocation().get(0).get(fromLocation).getScheduledDepartureTime())); return SafeHtmlUtils.fromString(dateFormat.format(scheduledDepartureTime, usPacific)); } else { return SafeHtmlUtils.fromString(""); } } @Override public SafeHtml getScheduledArrival(AmtrakCascadesServiceItem model) { String schedDepartureTime = model.getLocation().get(0).get(fromLocation) .getScheduledDepartureTime(); String schedArrivalTime = model.getLocation().get(0).get(toLocation) .getScheduledArrivalTime(); if ((fromLocation.equalsIgnoreCase(toLocation)) && (schedDepartureTime != null && schedArrivalTime != null)) { return SafeHtmlUtils.fromString(""); } else { if (schedArrivalTime != null) { Date scheduledArrivalTime = new Date(Long.parseLong( model.getLocation().get(0).get(toLocation).getScheduledArrivalTime())); return SafeHtmlUtils.fromString(dateFormat.format(scheduledArrivalTime, usPacific)); } else if (schedDepartureTime != null && !toLocation.equalsIgnoreCase(fromLocation)) { /* When a station only has a scheduled departure time and not arrival, * it is assumed that the train only stops for a short time at that station. * In these cases, the Amtrak site appears to show this scheduled departure * time as the scheduled arrival time so we'll do the same thing for the app. */ Date scheduledArrivalTime = new Date(Long.parseLong( model.getLocation().get(0).get(toLocation).getScheduledDepartureTime())); return SafeHtmlUtils.fromString(dateFormat.format(scheduledArrivalTime, usPacific)); } else { return SafeHtmlUtils.fromString(""); } } } @Override public SafeHtml getLastUpdated(AmtrakCascadesServiceItem model) { if (model.getLocation().get(0).get(fromLocation).getUpdateTime() != null) { String updateTime = updateDateFormat.format(new Date( Long.parseLong(model.getLocation().get(0).get(fromLocation).getUpdateTime()))); return SafeHtmlUtils .fromString(ParserUtils.relativeTime(updateTime, "MMMM d, yyyy h:mm a", false)); } else { return SafeHtmlUtils.fromString(""); } } @Override public SafeHtml getTrain(AmtrakCascadesServiceItem model) { if (model.getLocation().get(0).get(fromLocation).getTrainMessage() == null) { return SafeHtmlUtils .fromString(model.getLocation().get(0).get(fromLocation).getTrainName()); } else { return SafeHtmlUtils .fromString(model.getLocation().get(0).get(fromLocation).getTrainName() + " - " + model.getLocation().get(0).get(fromLocation).getTrainMessage()); } } @Override public SafeHtml getDepartureComment(AmtrakCascadesServiceItem model) { if (model.getLocation().get(0).get(fromLocation).getDepartureTime() != null) { Date departureTime = new Date(Long .parseLong(model.getLocation().get(0).get(fromLocation).getDepartureTime())); Date scheduledDepartureTime = new Date(Long.parseLong( model.getLocation().get(0).get(fromLocation).getScheduledDepartureTime())); int minutesDiff = (int) (((departureTime.getTime() - scheduledDepartureTime.getTime()) / 1000) / 60); String scheduleType = model.getLocation().get(0).get(fromLocation) .getDepartureScheduleType(); String timelyType = "on time"; if (minutesDiff < 0) { timelyType = " early "; } else if (minutesDiff > 0) { timelyType = " late "; } if (scheduleType.equalsIgnoreCase("Estimated")) { if (minutesDiff == 0) { return SafeHtmlUtils.fromString("Estimated " + timelyType); } else { return SafeHtmlUtils .fromString("Estimated " + getHoursMinutes(Math.abs(minutesDiff)) + timelyType + " at " + dateFormat.format(departureTime)); } } else { if (minutesDiff == 0) { return SafeHtmlUtils.fromString("Departed " + timelyType); } else { return SafeHtmlUtils .fromString("Departed " + getHoursMinutes(Math.abs(minutesDiff)) + timelyType + " at " + dateFormat.format(departureTime)); } } } else { return SafeHtmlUtils.fromString(""); } } @Override public SafeHtml getArrivalComment(AmtrakCascadesServiceItem model) { String schedDepartureTime = model.getLocation().get(0).get(fromLocation) .getScheduledDepartureTime(); String schedArrivalTime = model.getLocation().get(0).get(toLocation) .getScheduledArrivalTime(); if ((fromLocation.equalsIgnoreCase(toLocation)) && (schedDepartureTime != null && schedArrivalTime != null)) { return SafeHtmlUtils.fromString(""); } else { if (model.getLocation().get(0).get(toLocation).getArrivalTime() != null) { Date arrivalTime = new Date(Long .parseLong(model.getLocation().get(0).get(toLocation).getArrivalTime())); Date scheduledArrivalTime; if (schedArrivalTime != null) { scheduledArrivalTime = new Date(Long.parseLong(schedArrivalTime)); } else { /* Stop looking for the scheduled departure time if origin and destination * stations are the same */ if (!toLocation.equalsIgnoreCase(fromLocation)) { /* When a station only has a scheduled departure time and not arrival, * it is assumed that the train only stops for a short time at that station. * In these cases, the Amtrak site appears to show this scheduled departure * time as the scheduled arrival time so we'll do the same thing for the app. */ scheduledArrivalTime = new Date(Long.parseLong(model.getLocation().get(0) .get(toLocation).getScheduledDepartureTime())); } else { return SafeHtmlUtils.fromString(""); } } int minutesDiff = (int) (((arrivalTime.getTime() - scheduledArrivalTime.getTime()) / 1000) / 60); String scheduleType = model.getLocation().get(0).get(toLocation) .getArrivalScheduleType(); String timelyType = "on time"; if (minutesDiff < 0) { timelyType = " early "; } else if (minutesDiff > 0) { timelyType = " late "; } if (scheduleType.equalsIgnoreCase("Estimated")) { if (minutesDiff == 0) { return SafeHtmlUtils.fromString("Estimated " + timelyType); } else { return SafeHtmlUtils .fromString("Estimated " + getHoursMinutes(Math.abs(minutesDiff)) + timelyType + " at " + dateFormat.format(arrivalTime)); } } else { if (minutesDiff == 0) { return SafeHtmlUtils.fromString("Arrived " + timelyType); } else { return SafeHtmlUtils .fromString("Arrived " + getHoursMinutes(Math.abs(minutesDiff)) + timelyType + " at " + dateFormat.format(arrivalTime)); } } } else { return SafeHtmlUtils.fromString(""); } } } @Override public boolean canBeSelected(AmtrakCascadesServiceItem model) { /* if (model.getLocation().get(0).size() > 2) { return true; } else { return false; } */ return false; } /** * * @param minutesDiff * @return */ private String getHoursMinutes(int minutesDiff) { int hours = (int) Math.floor(minutesDiff / 60); int minutes = (minutesDiff % 60); if (hours == 0) { return minutes + ParserUtils.pluralize(minutes, " minute ", " minutes "); } else { if (minutes == 0) { return hours + ParserUtils.pluralize(minutes, " hour ", " hours "); } else { return hours + ParserUtils.pluralize(hours, " hour ", " hours ") + minutes + ParserUtils.pluralize(minutes, " minute ", " minutes "); } } } }); initWidget(uiBinder.createAndBindUi(this)); accessibilityPrepare(); if (MGWT.getOsDetection().isAndroid()) { leftFlexSpacer.setVisible(false); } } @UiHandler("backButton") protected void onBackButtonPressed(TapEvent event) { if (presenter != null) { presenter.onBackButtonPressed(); } } @UiHandler("cellList") protected void onCellSelected(CellSelectedEvent event) { if (presenter != null) { int index = event.getIndex(); presenter.onItemSelected(index); } } @Override public void setPresenter(Presenter presenter) { this.presenter = presenter; } @Override public void setTitle(String title) { this.title.setHTML(title); } @Override public void render(List<AmtrakCascadesServiceItem> createTopicsList) { cellList.render(createTopicsList); } @Override public void showProgressIndicator() { progressIndicator.setVisible(true); } @Override public void hideProgressIndicator() { progressIndicator.setVisible(false); } @Override public void refresh() { pullToRefresh.refresh(); } @Override public void setHeaderPullHandler(Pullhandler pullHandler) { pullToRefresh.setHeaderPullHandler(pullHandler); } @Override public PullArrowWidget getPullHeader() { return pullArrowHeader; } @Override public HasRefresh getPullPanel() { return pullToRefresh; } @Override public void setFromToLocation(String fromLocation, String toLocation) { this.fromLocation = fromLocation; this.toLocation = toLocation; } @Override public void setSelected(int lastIndex, boolean b) { cellList.setSelectedIndex(lastIndex, b); } private void accessibilityPrepare() { // Add ARIA roles for accessibility Roles.getButtonRole().set(backButton.getElement()); Roles.getButtonRole().setAriaLabelProperty(backButton.getElement(), "back"); Roles.getHeadingRole().set(heading.getElement()); Roles.getProgressbarRole().set(progressIndicator.getElement()); Roles.getProgressbarRole().setAriaLabelProperty(progressIndicator.getElement(), "loading indicator"); // TODO Hide pull down until we can figure out how to get VoiceOver to work with it Roles.getButtonRole().setAriaHiddenState(pullArrowHeader.getElement(), true); } }